Kestrel 4500 Instrukcja Użytkownika Pobierz pdf (Strona 15)

Kestrel

4500 Pocket Weather

Tracker 29

True North

True north is a navigational term referring to the direction of the North Pole relative to the navigator’s

position. The direction of true north is marked in the skies by the celestial north pole.

Wet Bulb Temperature

The lowest temperature to which a thermometer can be cooled by evaporating water into the air

at constant pressure. This measurement is a holdover from the use of an instrument called a sling

psychrometer. To measure wet bulb temperature with a sling psychrometer, a thermometer with a wet

cloth covering over the bulb is spun rapidly through the air. If the relative humidity is high, there will be

little evaporative cooling and the wet bulb temperature will be quite close to the ambient temperature.

Some exercise physiology guides use wet bulb temperature, rather than heat index, as a measure of the

safety of exercise in hot and humid conditions.

Wind Chill

The cooling eect of combining wind and temperature. The wind chill gives a more accurate reading

of how cold it really feels to the human body. The Kestrel Meter’s wind chill is based on the National

Weather Service standards as of November 1, 2001.

DEFAULT SETTINGS

UNIT METRIC IMPERIAL

Wind Functions M/s mph

Temperature Functions °C °F

Barometric Pressure hPa inHg

Altitude Functions M Ft

Time Format 24 hour 12 hour

Date Format Day/month/year Month/day/year

SETTING FACTORY DEFAULT

Automatic Data Store On

Data Store Rate 1 hour

Data Overwrite On

Manual Data Store On

User Screen 1 Direction, wind speed, temperature

User Screen 2 Temperature, Humidity, dewpoint

User Screen 3 Pressure, altitude, density altitude

Display Contrast 10

Automatic Shutdown 15 minutes

Language English

PC Upload

Stored data may be uploaded to a PC with the optional Kestrel Interface.

FREQUENTLY ASKED QUESTIONS

How do I set my Kestrel Meter to read the correct barometric pressure and altitude?

To measure these values accurately, you must know either your current pressure or altitude. If you

know the current barometric pressure, go to the altitude screen, and press the button to enter the

reference pressure. As you adjust the reference pressure, you will notice that the altitude will change.

Once the reference pressure is entered, note the new altitude, and go to the barometric pressure screen.

Press the button to enter this altitude as the reference altitude. Your Kestrel Meter is now displaying

the accurate pressure and altitude. (If you start with a known altitude, simply start with entering this

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